Labour and the Liberal Democrats can beat the Conservatives if they heed the lessons of the 1997 election victory and make a positive case for working together.

Former Liberal Democrat Policy Director and special adviser Duncan Brack goes behind the scenes of the parties’ 1997 negotiations and unearths the lessons for how they win next time.

The local elections showed that there is an anti-Conservative majority in the UK, but not a Labour majority.

Tactical campaigning and voting has already helped the Lib Dems to stunning by-election victories in Chesham & Amersham and North Shropshire.

This timely report shows that a progressive alliance has happened before – and can happen again, better.

Check out coverage in the Observer: A Lab-Lib pincer movement is the most effective way to strike fear into the Tories